HEAD MOUNTED DISPLAY

• US 20110279355A1
• Filed: 07/21/2011
• Published: 11/17/2011
• Est. Priority Date: 01/27/2009
• Status: Active Grant

• Current Assignee: Brother Kogyo Kabushiki Kaisha
• Original Assignee: Brother Kogyo Kabushiki Kaisha
• Inventors: YAMADA, Hideaki, YASUE, Norimi
• Granted Patent: US 8,928,556 B2
• Time in Patent Office: Days
• US Class Current: 345/8
• CPC Class Codes: G02B 2027/0112 comprising device for genereting colour display
• CPC Class Codes: G02B 2027/0118 comprising devices for improving the contrast of the display / brillance control visibility
• CPC Class Codes: G02B 2027/0138 comprising image capture systems, e.g. camera
• CPC Class Codes: G02B 2027/014 comprising information/image processing systems
• CPC Class Codes: G02B 27/017 Head mounted
• CPC Class Codes: G09G 2340/10 Mixing of images, i.e. displayed pixel being the result of an operation, e.g. adding, on the corresponding input pixels
• CPC Class Codes: G09G 5/397 Arrangements specially adapted for transferring the contents of two or more bit-mapped memories to the screen simultaneously, e.g. for mixing or overlay G09G5/02 takes precedence
• CPC Class Codes: H04N 21/434 Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream demultiplexing of data packets for data networks, e.g. RTP/UDP H04L65/00

Abstract

An imaging unit images a predetermined range including at least a range where an image is displayed out of a field-of-view range of a user. An image forming unit forms a background canceling image which cancels a background image which is visually recognized by a user via an external light based on an imaged image imaged by the imaging unit. The image forming unit combines the background canceling image with the original image corresponding to original image information by aligning them in terms of display position and size. An image formed by combining the background canceling image with the original image is displayed on the display unit by a display control unit.

Claims

1. A head mounted display comprising:

a display unit which is configured to project an image light having intensity corresponding to image information on an eye of a user thus allowing the user to visually recognize an image corresponding to the image light while allowing an external light to pass therethrough;

an imaging unit which is configured to image a predetermined range including at least a range where the image is displayed out of a field-of-view range of the user;

an image forming unit which is configured, when an image is superposed on a background image derived from the external light and visually recognized by the user, to form a background cancelling image which constitutes the image having reference background brightnesses which are fixed brightnesses within a predetermined frame period for respective three primary colors and cancels the background image based on an imaged image imaged by the imaging unit;

an image processing unit which is configured to combine the background cancelling image with an original image corresponding to original image information by aligning the background cancelling image and the original image with each other in terms of display position and size; and

a display control unit which is configured to perform a control by which an image to which the background cancelling image is combined is displayed by the display unit.

2. The head mounted display according to claim 1, wherein the image forming unit is configured to set, based on maximum brightnesses of respective colors of the imaged image, the reference background brightnesses for respective colors.

3. The head mounted display according to claim 1, wherein the image forming unit is configured to set the reference background brightness for respective colors based on the highest brightness out of maximum brightnesses for respective colors of the imaged image.

4. The head mounted display according to claim 1, wherein the image forming unit is configured to set the reference background brightness based on maximum brightness with which imaging by the imaging unit is allowed.

5. The head mounted display according to claim 1, further comprising:

a manipulation unit which is manipulable by the user; and

a display deciding unit which is configured to decide whether combining of the original image with the background cancelling image is to be made valid or invalid in response to a manipulation of the manipulation unit.

6. The head mounted display according to claim 1, further comprising:

an imaged image analyzing unit which is configured to analyze the imaged image;

an imaged image determination unit which is configured to determine whether or not the imaged image is a specific imaged image based on a result of analysis made by the imaged image analyzing unit; and

a display deciding unit which is configured to decide whether combining of the original image with the background cancelling image is to be made valid or invalid based on a result of determination made by the imaged image determination unit.